Max Pearson presents a collection of this week’s Witness History episodes from the BBC World Service. We hear from Zoheb Hassen, one half of a sibling duo from Pakistan who topped the charts in countries all over the world with their dancefloor filler, Disco Deewane. Our guest is BBC radio presenter and Pakistani music fan Raess Khan. He talks about how Pakistani pop music evolved from Zoheb’s success. Entertainment star Debbie McGee, who is best known for being the assistant and wife of British magician Paul Daniels talks about escaping from Iran at the start of the revolution in 1978. In 2004 a supermarket fire in Paraguay killed more than 300 people. It was the country’s biggest peacetime disaster. One of the survivors, Tatiana Gabaglio tells her story. Plus, how one of Bosnia's most famous landmarks, the historic bridge in Mostar, was destroyed by Croat guns during the Bosnian war in 1993 Finally, the unlikely friendship of a hippo and a tortoise following the tsunami in 2004. Contributors: Zoheb Hassen – former popstar Raess Khan – BBC presenter and Pakistani pop fan Debbie McGee – British celebrity Tatiana Gabaglio – supermarket fire survivor in Paraguay Mirsad Behram – journalist Eldin Palata – cameraman Dr Paula Kahumbu – wildlife conservationist (Photo: Nazia and Zoheb Hassen in 1982. Credit: BBC)